Influence of substituent position in aromatic diamines on coumarin derivative

Nirupama, J.M.; Melavanki, Raveendra; Khanapurmath, Netravati; Chougala, Lakkanna S.; Kulkarni, Manohar V.; Kadadevarmath, Jagadish S.

doi:10.1016/j.jphotochem.2021.113560

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…1720, 1619 and 1408 cm −1 , respectively. 28 These bands are almost unaffected in the band position and intensity in the nickel complex spectra at ca. 1725, 1638 and 1400 cm −1 , indicating the non-involvement of these functionalities in coordination with the metal atom.…”

Section: Resultsmentioning

confidence: 96%

Comprehensive enhancement in electrocatalytic oxygen evolution performance of nickel and cobalt complexes derived from π-conjugated N-heterocyclic carbene ligands through carbon composite strategy

Vijayakumar,

Yhobu,

Małecki

et al. 2024

Catal. Sci. Technol.

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Section: Resultsmentioning

confidence: 96%

Comprehensive enhancement in electrocatalytic oxygen evolution performance of nickel and cobalt complexes derived from π-conjugated N-heterocyclic carbene ligands through carbon composite strategy

Vijayakumar,

Yhobu,

Małecki

et al. 2024

Catal. Sci. Technol.

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“…The FT–IR spectra of salt 3 and the metal–NHC complexes 4 – 7 in the KBr matrix displayed the lactonic C=O in the range of 1698–1721 cm –1 as the characteristic stretching band for the identification of the coumarin appendant. As for the triazole cores, C=N stretching vibrations were observed in the range of 1578–1625 cm –1 . The former stretching vibrations are almost unaltered compared with free triazolium salt, indicating that the lactonic carbonyl oxygen is not involved in coordination with the metal atom.…”

Section: Results and Discusionmentioning

confidence: 97%

Augmenting the Electrocatalytic Activities of Metal–N-Heterocyclic Carbene Complexes as Bifunctional Electrocatalysts for Hydrogen and Oxygen Evolution Reactions by Carbon Composite Strategy

Vijayakumar,

Achar,

Yhobu

et al. 2024

Energy Fuels

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The pursuit of efficient transformation of green energy sources through water electrolysis necessitates the expansion of reasonable, earth-abundant, and robust bifunctional electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In this connection, N-heterocyclic carbenes (NHCs) coordinated metal complexes have become one of the most stimulating and ubiquitous classes of organometallics due to their ease of preparation and modularity in stereoelectronic possessions. Here, we report a series of metal NHC complexes synthesized by the reaction of an NHC precursor with an appropriate metal source and thoroughly characterized using spectral and analytical techniques. Both metal−NHC complexes and their carbon composites using multiwalled carbon nanotubes (MWCNT) and graphene plates (GP) were tested for their electrochemical HER and OER performances in acidic and basic electrolytes, respectively. The MWCNT and GP composites displayed improved HER activity compared with the bare complexes. Furthermore, a two-fold improved OER performance of the carbon composites was evident compared with the activity of the bare metal−NHC complexes to achieve the overpotential (η 10 ). Furthermore, the electrochemical impedance spectroscopic technique was used to bring out the key information required to justify the activity trend in HER and OER reactions and the nature of the electrode−electrolyte interaction of electrocatalysts.

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“…Therefore, quinoline derivative compounds should improved efficiency of luminescence and brightness in OLEDs. [ 7–29 ] Organic crystals contain electron donor groups as well as acceptor groups on either side of conjugated π‐bond. Mobility increases because there is overlapping between delocalized electronic charge and π orbits.…”

Section: Introductionmentioning

confidence: 99%

Effect of fluorescence quenching model on quinoline derivative with cobalt chloride metal ion using steady state and time resolved spectroscopic methods

et al. 2022

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Quinoline derivative, i.e. quinilone yellow with the scientific name [sodium 2-(2,3-dihydro-1,3-dioxo-1H-inden-2-yl)quinoline-6,8-disulphonate] (SQDS) is analysed for fluorescence resonance energy transfer (FRET). Fluorescence quenching mechanism is studied by employing steady state and transient state spectroscopic measurements. Cobalt chloride is used as quencher in the present study. Linearity was observed in Stern-Volmer plots for transient state as well as steady state. This was further attributed to a mechanism of collisional quenching. Efficiency in fluorescence quenching is observed as there is a correlation between quenching constants of both transient and steady state. A significant energy transfer is reported between metal ions and SQDS molecule, according to FRET theory. Characterization results are studied and analysed. Application in the field of non-linear optics are predicted for SQDS. With Kurtz and Perry powder technique, SHG (second harmonic generation) efficiency was measured using Q-switched mode locked Nd:YAG laser emitting 1064 nm the first time with this compound.

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Influence of substituent position in aromatic diamines on coumarin derivative

Cited by 5 publications

References 31 publications

Comprehensive enhancement in electrocatalytic oxygen evolution performance of nickel and cobalt complexes derived from π-conjugated N-heterocyclic carbene ligands through carbon composite strategy

Comprehensive enhancement in electrocatalytic oxygen evolution performance of nickel and cobalt complexes derived from π-conjugated N-heterocyclic carbene ligands through carbon composite strategy

Augmenting the Electrocatalytic Activities of Metal–N-Heterocyclic Carbene Complexes as Bifunctional Electrocatalysts for Hydrogen and Oxygen Evolution Reactions by Carbon Composite Strategy

Effect of fluorescence quenching model on quinoline derivative with cobalt chloride metal ion using steady state and time resolved spectroscopic methods

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